2道LSAT题请教，谢谢各位

木川

12. Purebred dogs are prone to genetically determined abnormalities. Although such abnormalities often can be corrected by surgery, the cost can reach several thousand dollars. Since nonpurebred dogs rarely suffer from genetically determined abnormalities, potential dog owners who want to reduce the risk of incurring costly medical bills for their pets would be well advised to choose nonpurebred dogs.

Which one of the following, if true, most seriously weakens the argument?

(A) Most genetically determined abnormalities in dogs do not seriously affect a dog’s general well-being.

(B) All dogs, whether purebred or nonpurebred, are subject to the same common nongenetically determined diseases.

(C) Purebred dogs tend to have shorter natural life spans than do nonpurebred dogs.

(D) The purchase price of nonpurebred dogs tends to be lower than the purchase price of purebred dogs.

(E) A dog that does not have genetically determined abnormalities may nevertheless have offspring with such abnormalities.

这题我怎么觉得答案应该是E呢？LSAT答案是A

22. Politician: From the time our party took office almost four years ago the number of people unemployed city-wide increased by less than 20 percent. The opposition party controlled city government during the four preceding years, and the number of unemployed city residents rose by over 20 percent. Thus, due to our leadership, fewer people now find themselves among the ranks of the unemployed, whatever the opposition may claim.

The reasoning in the politician’s argument is most vulnerable to the criticism that

(A) the claims made by the opposition are simply dismissed without being specified

(B) no evidence has been offered to show that any decline in unemployment over the past four years was uniform throughout all areas of the city

(C) the issue of how much unemployment in the city is affected by seasonal fluctuations is ignored

(D) the evidence cited in support of the conclusion actually provides more support for the denial of the conclusion

(E) the possibility has not been addressed that any increase in the number of people employed is due to programs supported by the opposition party.
此题我的答案是C，LAST答案是D.

请教

谢谢。

nina23

12题，，A中，既然这种遗传病并不影响狗狗们的健康，狗狗的主人也无须给它作手术(即不必花钱)，这种清况下纯种狗还是比非纯种狗有优势的。

D E 加强原题结论，，，B C无关，

nina23

22题，，题目要求找出most vulnerable to the criticism 。C也是一个原因但D是最好的答案。
因为原文中说From the time our party took office almost four years ago the number of people unemployed city-wide increased by less than 20 percent，说明失业人数增长的没有以前快了，但还是在增长。结论又说fewer people now find themselves among the ranks of the unemployed，明显是茅盾的，所以D最好。